Facial redness and allergy usually belongs to atopic dermatitis, which is related to the contact with allergenic factors, and can be relieved by general treatment, medication, and other treatments. 1. General treatment: patients should look for triggers and remove them. At the same time, avoid violent scratching and hot water, so as not to aggravate the local redness and swelling and allergic symptoms. 2. Medication: patients can take antihistamines such as oral loratadine, phenylephrine, chlorpheniramine maleate, cetirizine, etc., so as to improve the local itching symptoms. At the same time, combined topical calcium-modulated phosphatase inhibitors such as pimecrolimus ointment and tacrolimus ointment are used. If necessary, use hydrocortisone, prednisone and other glucocorticosteroids. 3. Other treatments: In allergic skin, patients can relieve local redness, swelling and itching by cold compress or cold spray. It is recommended to use medication under the guidance of a doctor, not blindly self-medication to avoid adverse effects. If the symptoms can not be relieved, it is recommended to go to the hospital in time to receive standardized diagnosis and treatment.